Mortising machine



April 13 1926.

W. LOEFFLER MORTISING MACHINE Filed August 25. 1923 9 Sheets-Sheet 1MORTI S ING MACHINE Filed August 25. 1923 9 Sheets-Sheet 2 wmm April 131926. 1,580,743

W. LOEFFLER "ORTISING IACHINE Filed August 25, 1923 9 Sheets-Sheet I!April 13,1926. 1.580343 W. LOEFFLER MORTIS ING MACHINE Filed August 25.19215 9 Sheets-Sheet 4 April 13 1926.

W. LOEFFLER MACHINE MOR'TISING Filed August 25 1923 9 sh t qg 5.W/l/I/I/ll/A April 13 1926. w. LOEFFLER moansms momma 9 Sheets-SheetFiied August 25v 1925 April 13 1926.

W. LOEFFLER MORTISING MACHINE Filed August 25. 1923 Q Sheets-Sheet 8April 13 1926; 1,580,743

W. LOEFFLER MORTISING MACHINE Patented A r. 13, 1926.

WILLIAM LOEFFLER, OIE SHEBOYGAN, VJISCONQIN.

MORTISING MACHINE.

Application filed August 25, 1923.

To all 107mm 2'! may conccm:

Be it known that I, ii iiii'imii Lonrniian, a citizen of the UnitedStates, and resident of Sheboygan, in the county of Sheboygan and Stateof Wisconsin, have invented certain new and useful Improvements inMortising Machines; and 1 do hereby declare that the following is afull, clear, and exact descrip tion thereof.

This invention relates to inortising machines and is particularlydirected to a power driven machine.

In mortising machines as heretofore constructed, difficulty has beenexperienced in providing a machine whichwill permit the rapid formationof a ies of re 'ularly spaced inortises, and which will form exactlysimilar mortises at each operation' Frequently these machines requirethe j ridgment of the operator for their correct manipulation, andconsequently the successive mortises are not exactly alike but 'arysuiticiently to cause trouble where quantity production is attempted. Inaddition to this, the changing oi work is a relatively slow process,.and considerable time is therefore wasted. V

This invention is designed to overcome the above noted defects, and toprovide a mortising machine which will rapidly form identical mortiseswhich willrapidly form ,a succession of regularly spaced mortise-s,

and to provide a machine in which the work may be quickly and accuratelyclamped in position.

Further objects are to provide a mortising machine especially designedfor quantity production; which will handle a la a number of similarpieces of work in a sue a interval of time; which will utilize anyone ofseveral guides or gauges for rapidly setting the work at severesuccessive points, and to provide a machine which will auto maticallyfeed the tool into the work, and which will automatically stop when themortise is complete, thereby dispensing with the j uc'lgnient of theoperator.

Further objects are to provide a machine which will cut. a mortise ofany desired contour, and which may be quickly adjusted to cut mortisesof any desired depth, length, and at any angle.

Further objects are to provide a machine which is of sturdy andcomparatively sim- Serial No. 659,322.

ple construction; which may be used by an unskilled operator, and whichemploys a relatively small number of parts.

Although the invention is described primarily as a machine for cuttingmortises in chairs, it is to be distinctly understood that the lnventionis not to be limited by the detailed disclosure, but is to be limitedonly as set forth in the appended claims.

I An embodiment ofthe invention is shown mthe accompanying drawings, inwhich Figure 1is a side elevation, partly in section, of the mortisingmachine.

Figure 2 is a sectional view on the-line 2-2 of Figure 1.

Figure is a sectional view on the line 3-3 of Figure 1.

rigure is a view of a portion oi be driving mechanism, such viewcorresponding to the section on the line i% of Figure 1, the gearing andcertain other'portic-ns being shown unsectioned.

Figure 5 is a detail View of oneof the guides for the mortising toolshaft.

Figure 6 is a view of a further form 01 guide.

Figure 7 is a fragmentaryview of the adjustable mounting for the tableshowing the protractor scale.

FigureS is a detailoi? one of the pivotal joints of the feeding levers.

Figure 9 is a detail of a further pivotal joint of the feeding leversand corresponding to a sectional view on the line 9-9 oi Figure 10. j

Figure 10 is a further detail. of a. pivotal joint of the feedinglevers.

Fi ure 11 is a detail of the adjustable or oscillating the niortisingtool.

Figure is a plan view of the table showing the and clamps and a theirseat in position.

Figure 13 is a sectional view on the line 13 13 of Figure 12.

Figure 14; is a sectional view on the line 14-4 1- of Figure 12. V

Figure is a detail view of one of-the guide tracks, such viewcorresponding to a section on the line 15 15 of Figure 12.

Figure 16 is a sectional view on the line 1616 of Figure 12.

Figure 17 is a sectional view on the line 1?17 of Figure 12.

Figure 18 is i Plan view of the tableshowing the clamps and guide t 'ackwhich are adapted for handling other forms of work, such for instance asthe tops of chair backs.

Figure 19 is a sectional view on the line 19 19 of Figure 18.

Figure 20 is a detail of the clamp shown in Figure 18.

Figure 21 is of Figure 20.

The inortising inachine chosen for illu. tration is particularly adaptedfor the mannfacture of chairs. It is designed to employ a revolublecutter 1 of any suitable few which is adapted to be projected upwardlyand laterally oscillated thru an aperture 2 ."i taole 3 which receivesthe work upon its face. lhe table 3 is adjustably carsuppcrted from thehollow standthe machine. The cutter 1 is carby the upper end 5 aniupwardly projecting shaft (7. such sha t being; conveniently providedwith flatt wrench receiving faces 7. whereby it i be held while thelockir j nut 8 of 'he i: is adjusted The sha 3 is carried nuthin ahollow housing 9, to whose upper end a sleeve 10 is thre (led, and towhose lower end a sleeve l1 in an open casing 12 is a so threaded. Thisshaft is carried in suitable bushings, two of a section on the line 2121which are shown as int. ate cl at 13 and l-l, and, as is.well underst'd, may be hushed adjacent its upper end to provide suitable bearings.It is equipped with a crowned aid flanged pulley 15 positioned withinthe open casing 12, and is supported by any suitable form of thrusthearing, as, for instance, that shown in Figure 1, and comprising ahardened plug l, a ball 1., and a hardened cup 18, suitably housedwithin acap 19 carried by the lower end of the casing and locked inposition by means of the lock l se shaft is driven by scans of a belt 21ding thru the hollow casing 12 and l ind the crowned pulley 15. and thruthe ioilow stan lard l of the n achine. Upon opposite side of thestandard. a relelarge pulley 22 drives the belt 21 c is rigidly mountedupon a shaft 23 carried in suitable bearings supported from the housing.A smaller driven pulley 25 is rigidly inounted upon the shaft and isdriven by means of the belt 26 from any suitable sou cc of power.

T he shaft (3 is'iuounted for universal motion adjacent its lower end,and the means for securing this motion n'iay comprise trunnions 2proiecting laterally from the hollow casing 12, and carried withinforked arms 28. such forhed arins being pivotally supported within abearing 29 of a bracket 30. The inner face of the bracket 30 bolte'l tothe feeding plate 31, such plate having an arcuate outer dge 32,. and ana eerally formed with The means for laterally oscillating the 7 ctrriedcutter, may comprise a cranl; pin 31,

by a traveling block 38 dove-tailed w:

plate 40. The constri 'tion of this cranh sin and block are clearlyillustrated in iiiurcs P l 1, l and 11, and it will be seen that tl ccrank pin 37 is provided with a bushing i ped with an outwardlyextending in 4 adapted to upon the rear the crank plate l-O, and to beclamped posi ion by means of a nut, l3 thre ded upon the upper end ofthe crank pin 31, as will be clearly understood upon reference to res land 11. 'l hc position of the cranl: pin with reference 0 the center ofthe plate and conseipientl the adjo tnient of the throw or lateral swingof t no cutter. may be accurately secured by mean threaded stem 4%,whose outer end is provided with a flange 4. 5 and an adjust nieinberaid, positioned upon opposite sir of a web l? integral with the cranltplat i as may be seen from Figure l Jr scale 3 may be secured to theface of c i cooperating pointe 38 indicate the adjustment of the crankpin with reference to the center o the crank plate as shown in Figure 1.

The crank pin is connected with the sleere 10 (see Figure l) by means ofa compo pitnian comprising a member 4-8 pimtally nounted upon thebushing ll and provided with forked ears, between which a rod 4.)pivotally mounted. T his rod is pinned to a blocl: 50 which providedwith a threanled aperture 51 in its f rward cud, ada be closed by athreaded ply: on. The cnlarged end of a rod it is held between the plug52 and the block 50 so to prevent arirl nioven'ient and to allow rotaryrelative movement between the rod and the block :30. The forward end ofthe rod 5% terininates in a forked extension which is pivoted by meansof screws to the sleeve 10. It is to be noted at this pointthat thesleere 10 is so connected with the crank pin as to allow the shaft 6 toswing angular y in an de ired direction without producing an binding orstraining of the pitinan.

The means for rotating the crank plate l0 may comprise a horizontalshaft 57 llldY ill) threaded extension 81.

portion of this screw, or pivot pm, is pro-.

pinned or otherwise secured to the crank plate and provided with arelatively large gear 58. A second horizontal shaft 59 carries a smallergear 60 in mesh with the gear 58, and is provided with a set of conepulleys 61 which are adapted to receive a driving belt The shaft 57 isfurther provided with cone pulleys 63 which are connected with a thirdset of cone pulleys Getby means of a belt 65. This last set of conepulleys is carried upon a shaft 66, upon which is rigidly secured, apinion 67. A fourth shaft 68 carries a relatively large gear 9 looselythereon, to which gear one member 70 of a clutch is secured, the othermember 71 of such clutch being loosely splined upon the shaft 68. Theouter end of the shaft 68 carries a cam 72 whose purpose willhereinafter be described. The cam 72 is one in which the radiusgradually iir creases. The shafts 59, 5'7 and 68 may conveniently becarried in bearings formed in brackets 73 bolted to the rear face of themachine, and the shaft 66 may similarly be carried in bearings formedinbrackets 7 1 mounted below the bracket 73, as may be seen from Figures1 and 3.

The means for advancing the feeding plate 31 comprises a feeding lever75 pivotally mounted upon a screw 76 carried by the frame -el-. The rearend of the feeding lever 75 is provided with a cam follower roller 77,which cooperates with the cam 72 when such cam is rotated. The forwardend of the lever 75 is-provided with an elongated slot 78, within whichis mounted the enlarged portion 79, (see Figure 8) of a screw providedwith a head 30 'andwith a The intermediate vided with a squared portion82 which is adapted toslide within an elongated slot 83 formed in theadjusting lever Set of the feeding mechanism. It is held in any adjustedposition by means of a nut 85 which clamps the lever 8% between thewasher 86 and the shoulder formed by the enlarged portion 79, as will beapparent from reference to Figure 8. This adjusting lever 84 ispivotally mounted upon a pin 87 secured within a boss 88 of the standard4 and pinned in place, as indicated at 89. This pin has a threadedextension upon which nut 90 and washer 91 are positioned. This pin 87 isprovided with an enlarged portion 88 forming shoulders adapted to seatagainst the outer sur face of the boss 88 and against the washer 91, soas to permit the lever 84 to freely pivot about the enlarged portion. Anaperture 92 is formed thru the enlarged portion, and is provided withrounded faces as may be seen from Figure 9. Thru this aperture a spindle93 freely passes, such spindle being provided with an adjusting knurleddisk 94 upon its outer end and having its inner end threaded, asindicated at 95. This threaded inner end cooperates with a threadedaperture formed in squared portion 82 of the screw pivotally joining thelevers 7 5 and 84. In this manner the point of operative connectionbetween leve's 75 and 8% may be varied so as to vary the throw of thelever 84. This lever 84 is connected with the feeding plate 31 by meansof a composite pitman comprising enlarged end por tions 96 and 97connected respectively with the lever 84. and the plate 31, and joinedby means of a spindle 98 having reversely threaded ends and providedwith a knurled adjusting disk 99 intermediate its ends. This spindle maybe provided with locking nuts, as shown in Figure 1, whereby inadvertentmotion is avoided.

Attention is called to the fact that the pivot 34 of the feeding plateand the crank pin 37 are upon the same side of the shaft 6. These pointscontrol the angular position of the shaft as it is advanced upwardly.-Obviously the pivot point 34 may be moved as far to the right (seeFigure 1) asdesired, or as found expedient to maintain the shaft when inits middle position substantially vertical in all positions during thefeeding operation. In this manner, the continuously oscillating shaftwill rock back and forth thru an angle whose center line is at all timesapproximately vertical.

It will be seen from the mechanism thus described that the initialadjustment of the cutter with reference to the table top may be securedby turning the knurled disk 99, and that thereafter the desired throwmay be secured by adjusting the knurled disk 9%, subsequently tighteningthe nut 85 (see Figures 1 and 8). i

The clutch for throwing the cam into operation may be manipulated bymeans of a lever 100 pivotally' mounted at 101 to a bracket 102 upon theinner side of the easing 4-, and provided at one end with a forkedextension 103 loosely fitting within a groove formed in the movablesplined member 71 of the clutch. 'The outer end of the lever is providedwith a curved plate 10st adapted to be engaged by the knee of theoperator. A

s rin 105 is 'oined to the lever intermetfi diate the pivotal point 101and the plate 10 and to the casing i, may be seen from Figure 3, andurges the clutch into open position.' When, however, the clutch isforced into closed position, the frictional engagement of the teeth willbe sufficientto hold it in engagement and to operate the feedingmechanism by depressing the rear end of the lever 75 and elevating theinner end of the lever 84 and consequently the feeding disk 31. However,when the roller 77 snaps over the projecting portion of the cam 72, the

frictional engagement of the teeth, due to the driving of the spiralcam, is relieved and the spring 105 quickly opens the clutch.

The means for guiding the cutter in its lateral or oscillatory motion,comprises inwhich may be of recterchangeablc guides tangular formation,illustrated in Figure 5, or curved contour, as illustrated in Figure. 6.These guines i'i'iay comprise a rear elongatcl plate 10-6 :rovided withforwardly projecting arms 107.. to which a forward plate 108 is clampedby means of winged nuts 10.). These clamps are provided with trunnions110 which are car 'ie'd in bearing, one-half of which are tunnel inbrackets 111 (see Figure carried by the standard and the other half ofwh h are formed in caps 11S pivoted at .113 to the brackets 111, These.caps may he provided with clamping bolts 113, pi *oted as indicated at1141 there to, and adapted to enter slots 115 termed in he brackets 111so as to permit. ready removal of these guides. It is contemplate-flproviding the sleeve 10 (see Figu es 1, 5 and 6) with a roller sleeve116, which is po tioned between the plates 1013 and 10S oi? tee guides,so as to minimize friction. t is to be noted that the sleeve 10 does notrotate. This sleeve carries adiacent its upper end, a trough 117 for theshavings ot the cutter, such trough being conveniently slanteddownwardly at one end to guide the shavings to any desirec point. InFigure .6, the guides 106 and 108 are curved or arcuate, so as to form acorrespondingly arcua-te mortise w ien desired.

From the mechanism thus far described, it will be seen that the cutter 1is continuously rapidly rotated and oscillated, the roller 116 freelytra eline; within the guides. The pivotal and swiveled formation of thecomposite pitman formed of the members 4:9, andfl l, per nits the use ofany form oi": gfllltltc tlm guides due to their pivotal mountingpermitting; the relatively slight inner or outer swing; of the device.It will also be seen that the cutter remains in its lowest position, isshown in Figure 1, and oscillates back and forth in this position untilthe face plate 10 1 is forced sidewise by the workn'ians knee. lVhenthis occurs, the clutch members 'T1 engage, the cam 72 is relativelyslowly rotatet, thereby gradually proieci'iinp; the cutter into thework, the machine automatically ceasing to cut and the feedingmechanism, returning to its initial position at the completion of eachmortise, as previously described.

The table 3 is adapted to be set horizontal ly or at any desired angle,and may conveniently be provided with arcuate laterally projectedguiding ribs 118 which are slidably carried in similarly shaped slots119 formed in brackets 1'20 clamped around the corners ot the standard 4as may be seen from Figurcs 1, 2 and 1h screw 121 is paired thri' anare-uate slot formed in the lace of th is thrca-ile l into the videdwith inwardly projecting arms or lue's 121, which are u? a l by means ofbolts 25' to the under side oi the table 11" desired the table may heprovit ed with throat plate 126, within whic the aperture 2 is formed.It desired, av suitable protractor scale, as indicated at n'iay beformed upon the arcuate ribs eitl or or both sides of a table top toindicate the annular.seating;- of the tahle.

In order to provice for the accurate adjustinent and the lirin. supportof the table, a rod 12-8 is swi elled within a member 129 pivotallymounted between brackets 130 carried from the underside of the table'This rod may be provided with a hand wheel 131 intermediate its ends andwith a threaded lower portion 132, which is screwed into a 138 pivotallymounted between the u is 123-4; oi? bracket 135, bolted up n the)lllIQl" "face of the standart 1. 11 locking nut, which may convenientlybe in the form of a knurled disk 13%, may be threaded upon the iortionto lock the rod 128 in any desired position of adjustment.

in machines oi this type it is necessary to tor holding the work to theprovide means .le- 'lhis readily accomplished by me, 118 of the clan psit" de track herein" liter to he describec, c. in the particular machine1llustrate two sets of clamps have been provided for respectively holdra chair seat and the top of a chair back in position upon the table.Figures .1

inclusive, ilustratc one form of (.l2ll11)i( and guiding means for achair seat. It will be seen, upon reference to these figures, that thetable top 3 (see Figure 16) is provided with a channel shaped bracket13? upon undersit e, thru which st; in 1?? l slides, a set screw 139 b'clamp this strap in any The strap, or bar, 188, (see jects outw rdlybeyond the and thra slot 1 21) in it. sins outer the stra opening; thruwh', The uppei 'tion of tee ho This strap 144 extends the table top, andis provided with an upwardly extending portion 1418. and a substantiallyhorizonal portion 1&7, such latte A to 1T portion being adapted to rideupon an arouate track 148 hereinafter to be described in greater detail.The strap 144 is provided with an elongated slot 149, thru which a belt150 provided with a suitable nut is passed. This bolt also passes thru across strap 151 and secures the strap rigidly in adjusted position withreference to the strap 144,

such latter strap 151 being provided with downturned lugs 152, (seeFigure 16), which engage the side margins of the bar 144, and maintainsthe strap 151 at right angles to such bar. The strap, or bar. 151 isprovided with a downwardly extending lug 153, and with an elongated slot154. A bracket provided with an angular portion 155 and with spaced lugs156, is adjustably secured upon the bar 151 by means of a belt 157passed thru the slot 154 and into the bracket-the lugs 156 serving tomaintain the bracket in correct relation to the bar 151, as will bereadily understood. The lug 153 and the portion 155 are adapted to abutthe outer face and the side face of the chair seat 158 to therebyaccurately position the corner and consequently the entire seat withreference to the bars 154 and 151.

The gripping portion of this clamping mechanism comprises a bar 159whose central portion 160 is riveted to the bar 144. A pair or":clamping members 161 are slotted, as indicated at 162, to receive theouter ends of the bar 159 (see Figure 14), and to thereby slidablyengage such bar. These memhers 161 are provided with gripping jaws 163adapted to engage opposite sides of the chair seat 158. They are drawntowards each other by means of a spindle having oppositely threadedportions 164 and 165, threadably engaging upstanding lugs 166 and 167 ofthe members 161. The central portion of this reversely threaded spindleis provided with a knurled operating disk 168 which may be convenientlyguided by means of a pair of lugs 169 extending upwardly from thecentral portion 160 of the transverse bar, as may be seen from Figures13 and 14.

A. relatively stationary clamp is mounted upon the table and comprises'asupporting lug 170 which may be bolted to the table top and which isprovided with a pivotally joined lever 171 spring pressed upwardly bymeans of the helical spring 172. A threaded pin 173 is passed thru thespring 172 and securely bolted in position by means of a reducedextension 174 passed thru the table top and a clamping nut-175, Thispinpasses thru a fairly large aperture formed in the lever 171, and isprovided with a clamping nut 176, provided with a plurality of holes,into anyone of which a manipulating pin 177 may be screwed. The outer orfree end of this clamping lever 171 isprovided with a rounded face 178adapted to engage the edge of the chair seat 158 at a point above thethroat plate 126 and closely adjacent the opening 2 to thereby securelyhold the work at the point where it is subjected to greatest stress.

It is frequently the case that a plurality of regularly spaced mortisesare needed in a chair seat, and it is desirable therefore, to provideguides for readily'adjusting the chair seat and holding it in itssuccessive positions so that these mortises may be quickly formed. Thisis readily secured by meansof the arcuate track 148 which is providedwith a plurality of notches 179 spaced at the desired points throughoutits length. This track is backed by an arcuate reinforcing member 186,and is secured thereto at a plurality of points by means of the brackets181 which are clamped in position by the screws 182. This backing stripis held in position by means of angular brackets 183, bolted to thetable top and to said backing strip, as may be seen from Figures 12 andA lever 184 is pivotally carried between lugs 185, of a bracket 186bolted to the horizontal portion 147 of the bar 144, see Figures 1.2, 13and 14-). This lever is provided with a laterally projecting end 187which is adapted to engage anyone of the notches 179, and at its otherend, is provided with a thumb piece 188 by which it may he released. Oneof the brackets 185' extends upwardly and sidewise, and carriesa spring189 which urges the portion 187 of the lever into engagement with thenotches.

It is therefore apparent that the chair seat 158 may be readilypositioned by means of the lug 153 and portion 155 of the corner guide,and may be quickly clamped in position by the jaws 163the fit betweenthe bar 144 and the pin 141 being relatively loose and permitting theclamping mecha nism to be slightly raised to permit the insertion of achair seat therebeneath. After the clamps 163 have been tightened andthe mechanism moved until the transverse portion 187 of the lever snapsinto the appropriate notch 17 9, the clamping lever 171 is tightened bymeans of the arm 177, and a mortise is then quickly out in the correctposition. Thereafter the clamp 171 is loosened, the thumb piece 188depressed and the chair seat, while still. clamped between the members163, is rocked about the pin 141 until the lateral portion 187 of thelever snaps into the next notch, at which time the clamping lever 171 isagain locked down upon the chair seat and a second mortise out. In thismanner a succession of correctly spaced mortises may be formed withthegreatest of rapidity, and successive chair seats may be substituted withthe utnr st facility.

The means for clamping a chair back top are shown in Figures 18 to 21inclusive, which will now be described. A bar 190 replaces the bar 14. 1and is similarly provided with a plurality of spaced apertures 191adapted to engage the pin 1-1-1. The inner end of this bar is upturned,as indicated at 192, and is prcwidod with a pair of lugs 193 havingupstanding portions 194. It is further provided with laterally extendingarms 195, into which bolts 1% are screwed. A pair of clamps 19? areslidably related to these laterally extending arms 195, and are providedwith elongated slots 198 which receive the stems of the bolts 19%. Theseclamping members are provided with clamping jaws 199 ano with lugs 200into which the re ersely threaded ends of a spindle 201 are screwed, thespindle being provided with collars upon opposite sides of the lugs 193and being "further provided with an external manipulating, knurled disk203.

A notched track 20 i held in position by clamping brackets 20?, backingstrip 206, and supporting brackets 20?, in a manner similar to that pre-riousrv describe .l, is provided for positioning the chair back top 208at successive points for the mortises. lever 209 provioed with a thumbpiece 210 and a free locking end 211, is urged into locking position bymeans of a spring 219, so to lock thechair back top in any desiredposition of adjustment so that the successive mortises may be "formed atthe correct spacings.

A relatively stationary clamp is provided for engaging the chair backtop and com )rises a member having; an elongated slot thru which a bolt215 screwed into the table top passed to lock this member n its correctposition. A second somewhat similar member 216 is provided with anelongated set 21'': which loosely engages a guide bolt stem and isfurther provided wit: an upstanding; rear portion 219. T his rearportion receives the stem 220 oil an adjusling' screw 221, such stembeing provided with n external collar and with u enlarged head uponopposite sides of pstanding portion 219. The portion z-idapted toreceive an adjusting," rod e li i ures 18 and 19). The threaded screwsinto a lug 2:25 which is Qy locked to the table top by means of and nut22?.

After chair back top has been clan'iped in positi n by the jaws 199,'themovable clamping mechanism is rocked about the pivot pin 14:1 until thelever 209 cooperates with a notch in the track to lock the back incorrect position. tlhereatter the manipulating rod or handle is rockedto clamp the chair back top between the jaws and 2539 of the members 213and 216. When it desir to form the next mortise, it is. mere- 1ynecessary to release the jaw of the relatively stationary clamp anddepress the thmnb portion 210 of the lever 209, ther after allowing thelever to snag into the new" notch as the movable clamp, together withthe chair back top, is rotated about the pivot pin 141.

It will be seen that a mortise machine has been provided which isaoapted to form successive mortises at correctly spaced points within apiece of work in a rapid and etlicacious manner. It will also be seenthat a machine has been provided which automatically stops after theformation of each mortise, which automatically feeds the tool into thework and which operates in an extremely rapid manner.

It will further be seen that means have been provided for quicklyclamping:- the work in adjusted position and permitting itslOPOSltlOlllDg for successive mortises in an extremely simple and easilycontrolled manner.

I claim:

1.. A mortising machine comprising a revolubly mounted shaft lniving acuttercarrying end, means "for rotating said shalt, a housing for saidshaft, a support having a universal connection with said housing at apoint remote from the ci.ilter-cai"yitno end of said shaft, andmechanism tor 085i" lating said housing); laterally and longitudinallyof said machine.

2. A mortising machine comprising a movably mounted cutter-carryingmember, means for operating said member, a suppor housing for said membr a feed plate. a pivotal connection between said feed plate andhousing, a cam and lover i'neciiahism operatively connecting said feedplate and cam, whereby when said cam is rotated said cutter carr v ingmember is advanced ant returned to its initial, position.

3. A mortising machine comprising a movably moun ed cutter-carryingmelriber, means for operating said member, a S111 porting housing "forsaid member, a feed plate, a pivotal connection between said feed plateand housing, a cam, lev-r mechanie i operatively connecting said feedplate and cam, whereby when said cam is rotated, said cut ter carryingmember advanced and eturued to its initial posl ion, and means forautomatically stopping said cam after one complete cycle.

4. A mortising machine comprising a revolubly mounted shaft having acuttercarrying end, means for rotating said shalt. a housing for saidshaft, a support hav. a universal connection with said housing; at apoint remote from the cutter-carryine; end of said shaft, means foroscillating housing, and a removable guide for said housing adjacent thecutter-carrying end ol said shaft. 1

iii

5. A mortising machine comprising a revolubly mounted shaft having anouter cutter-carrying end, means for rotating said shaft, a l'iousingfor said shaft, a supporting member having a universal connection withsaid housing adjacent the inner end of said shaft, means for oscillatingsaid housing about its universal connection with said supporting member,and a pivoted guide for said housing adjacent the outer end of saidshaft.

6. A mortising machine comprising a re'volubly mounted shaft having acuttercarrying end, means for rotating said shaft, a housing for saidshaft, a feed plate hav ing a universal connection with said housing,means for oscillating said housing about its universal connection withsaid feed plate, a guide for said housing adjacent the cutter-carryingend of said shaft, and means for automaticallyadvancing said feed plateand returning it to its initial position.

7 A mortising machine c'on'iprising a revolubly mounted shaft having acutter-carrying end, means for rotating said shaft, a housing for saidshaft, a feed plate having a universal connection with said housing,means for oscillating said housing about its universal connection withsaid feed plate,

a guide for said housing adjacent the cuttercarrying end of said shaft.means for automatically advancing said feed plate and returning it toits initial position, and means for stopping said feed plate after acomplete cycle of movements. I

8. A. mortising machine comprising a revolubly mounted shaft having acuttercarrying end, means for rotating said shaft, a housing for saidshaft, a pivotally mounted feed plate having a universal connection withsaid housing, means for oscillating and guiding said housing, a drivingshaft, a cam, an automatically opening clutch for connecting said camand shaft and adapted to open after a complete cycle of operations,manual means for initially closing said clutch, and lever mechanismoperatively connecting said cam and feed plate, whereby said feed plateis rocked about its pivot to advance the cutter carry-*ing shaft andreturned to its initial position and automatically stopped after eachcomplete cycle of operations. i

9. A mortising machine comprislng a revo ubly mounted shaft having acuttercarrying end, means for rotating said shaft, a housing for saidshaft, pivotally mounted feed plate having a universal connection withsaid housing, means for oscillating and guiding said housing, a drivingshaft, a cam, an automatically opening clutch for connecting said camand shaft and adapted to open after a complete cycle of operations,

manual means for initially closing said clutch, and an adjustablecompound lever mechanism operatively couplingsaid cam and plate with avariable motion magnifying ratio.

10. In a mortising machine the combination of a table having an openingtherethrough, a mortising tool adapted to pass through said opening,means for operating said tool, a work clamp, means pivotally joiningsaid work clamp to said table, and a second and relatively stationaryclamp for locking the work to the table.

11. In a machine for operating upon work the combination of a table, awork clamp having, a pair of jaws, means for drawing said jaws towardeach other into gripping engagement with the work, means for pivotallyjoining said clamp to said table, an arcuate track mounted upon saidtable, and a member extending from said clamps and resting upon saidtrack.

12. In a machine for operating upon work the combination of a table, aworkclamp having a pair of jaws, means for forcing the jaws intogripping engagement with the work, a guiding track carried by said tableand having a plurality of stops, and releasable means carried by saidclamp and cooperating with said stops to definitely locate the work insuccessive positions.

13. In a mortising machine the combination of a table having an openingtherethrough, a mortising tool adapted to pass through said opening,means for operating said tool, a work clamp, a track carried by saidtable and having a plurality of spaced notches therein, means carried bythe work clamp and adapted to enter any one of said notches to positionthe successive portions of the work over said opening, and a clampcarried by said table and adapted to temporarily clamp the portion ofthe work adjacent said opening to said table.

14. In a mortising machine the combination of a table having an openingtherethrough, a mortising tool adapted to pass through said opening,mechanism for operat ing saidtool, means pivotally mounted upon saidtable for positioning and clamping said work, a track for said means andhaving a plurality of notches at spaced points alongits extent, a springpressed finger carried by said means and adapted to enter any of saidnotches to temporarily position the work, and a second clamp carried bysaid table and adapted to lock the work to said table at a pointadjacent said opening.

in testimony that I claim the foregoing I have hereunto set my hand atSheboygan,

in thecounty of Slieboygan and State of id isconsin. I

lVILLlAh I LOEFFLER,

